Erle king baker



Y E. K. BAKER.'

Vnfmmmmu mm. l, Armcmorq. mln M6114. me.

1,314,936. z Patented Sept. 2, 1919.

2 SHEET SSSSSSSS 2.

I. lTo all 'whom t may concern:

being carried as an UNITED STATES PATENT OFFICE.

EBLE KINGBAKEB, 0F CHICAGO, ILLINOIS, ASSIGNOB, T0 UNIVERSAL m CUEVA,

QF CHICAGO, ILLINOIS. A

nnncunmnnn am,

CGRPORATION 0F ILLINOIS.

I, Enne KING BAKER, a citizen of the United States, residing at Chicago, Cook county, Illinois, have invented certain new and usefu Improvements inDemountable Rims, of which the following is a specification.

My invention relates to demountable vrim constructions for motor vehicle wheels which are equipped with tires that require changing from time to time. It is the usual practice to put a pneumatic tire upon a deinountable rim,V` and there inflate it before mounting therim on the wheel of the motor vehicle. In event the tire is injured or deilatcd,ithe rim is demounted, and replaced by another bearing an inflated tire; and the detaching of the injured'tire from its rim, as well as the repairing of the tire, may be postponed. The-objects of my invention will be made clear by the following statement of the problems and needs presented by the above' delined practice.

The construction Be it known that of a pneumatic tire is such that it does not lend itselfto readyr adjustment upon a rim or Wheel. Therefore the rim should be made to fit the tire and should be se made that it will be easy teattach and detach the tire; and, the rim must be capable of safely and securely holding the tire, whether in service on the wheel or inflated spare. The rim and Wheel-,construction should be such that it will be easy to both mount and de ture cannotbe'pronounced mount the rim with Hated or deiated) and at the same time rovide for the secure and dependable hol ing wheel during service. The true circular form of the tire and rim should be constantly maintained. The tire should be held truly perpendicular to the axis of the wheel. vThe ,distortion of either the rim orthe tire'should be avoided. The concentricity of thev'tire and'rim with respect to the axis of thefwheel should be ositively insured and constantly maintained Unlessthe demounting means responds to the above requirements the strucsaie or desirable, and ithe circa ari'ty, concentricty, a perpendicularity of the tire are not maintained, *1lb #wi-'llbe ound that the life of thev tire is 'fniateriellly shortened. In addition to these freqnimlleiltft-is essentiel 'the ccn- Specieation of Letters Patent.

' mountability. security. nouwlistorti. cirts tire (whetlier in- Patented Sept. 2, 1919.

Application led August 14, 191B. Serial No. 114,801.

struction shall vbe of the least ivi-ight conslstent with the "ervfice to be rimmed, and itis commercially necessaryt at the rmt* ci manufacture and'maintemnee shall be low. Foriliae with standard Gletscher tires which have bllse beads that may be stretched over 50 theaiiges of the rim, the rim may he oi the integrally flanged endless typehand. to

that extent, simpler"V than those required or tires having non-stretchable base beeS 'P i accommodate the latter l may either tranes split the rim or provide it with a detachable llauge. But in all other respects. the prf'l" lem remains the same: for thrl ii'uxtter1i0f necularity, concentricitiv and perpendi larit) are of equal importance as to all ri s and tires.

The specific object of my invention is to provide a demountable rim construction which shall be applicable to rims and tires of all these types, and which shall provide a complete solution of all-of the above sta ted problems.

The present invention is a mod fication of the forms shown and claimed in S. Patent No. 1.183.518. In other words, my present invention comprises a wheel having a single circumferential and conical rim seat fo on its periphery, and a tirerarrying rim having a complementary conical seat b which it is cireumferentinllv tted to sai rim seat and is held out of contact with the remainder of the Wheel periphery in combination with clampin means adjustable on the outer sideof'said w eel and pressing axially against said rim to clutch said seats together. Y

` Tliiel general nature and principles of myinvention, and also the' details of the best embodiment thereof' that I have thus far 95 devised, will be understood on reference to the drawings which form part of this specifi cation; and are particularly pointed out in .the .nppnded claims.

Referring now to said drawingsz-Figare 1 isanouter side elevation of ai fully equippedfmotor vehicle wheel embodying my inventione-Fig 2' is an enlarged section on the line 2-#2 of Fig. 1;--Fi-g. 3 is a similar -section'but at a point between clam ing- 105 holte and showing a straight side rim ig.

4 illustrates one of the washers, clips, or .prescrire i-lngs used between the bolts and the demountable rim ;-Fig. 5 shows the outer peripher of the demountable rim, as it ap pears w 1ere rovided witlr one of the integral, shoul ered rejections that coact with the clamping uga-Fig. 6 is a sectional view like unto ig. 2, but showin a demountable rim of hot-rolled section; 1g. 7 is a section of the same at a point between clamping bolts; and Fig. 8 is an inner periphery view of the rim shown in Figs. (i and 7.

As shown in the drawings, T represents the pneumatic tire ;and, 2 represents the demountable rim on which the tire is held or carried. As made clear by Figs. 2, 3, 6, and 7, the demountable rim 1n each case is provided-'with preferably integral flanges, 3 3, and these fianges partake of the form of the tire. If the tire is of clencher crosssection, the rim is likewise of the clencher type; and if the tire is of the straight side tfpe the rim flanges are made to conform t ierewith. A clencher rim is shown in Fig. 2'and a straight side rim in Fig. 3. I prefer that the demountable rim shall be formed or rolled from cold rolled metal, as indicated in Figs. 2 and 3, but the same may be made from hot rolled section, as shown in Figs. 6 and 7.

In the drawings, 4 represents the wheel hub ;-5 the spokes;'6 the felly;-and, 7 the fell band or xed rim. The Wheel di'ers rom others in that the felly band instead of being of cylindrical form, is o tapered or conical forni, and the wheel felly is tapered to lit it. The conical felly band is made up of a. body portion substantially co-extensive with the width of the felly, 6, plus an overhanging or back-Bange portion,

which preferably is of greater pitch than the body portion.

The dimensions of the parts are such that when the demountable rim is placed on the fixed rim a space, 8, remains between the two rims; except at the back flange, where the conical surface, 2", ofthe demountable rim rests upon the conical back' flange, 7. Obviously, lthis arrangement insures the proper centering of the demountable rim upon the xed rim and it only remains to provide means which shall bind the demountable rim firmly in that position on the fixed rim.

To that end I provide the demountable rim with eitherl a single peripheral projection. fl. or a plurality ofperiplieral projections, -J.

' These projections present abrupt shoulders,

11, against which suitable clamping devices exert their force or thrust, to drive the de mountable rim firmly upon theback flange of thevlixed rim.

It will be noted that, the shoulders, 11, of the projections, 9, and, 10,preferablv project beyond the outer edge, 7", of the f ixedrim. This is the preferred relation, but 1f desired the shoulder ma 1 be positioned inwardly of the-edge of the xed rim.

I find it desirable to so form or proportion the propections, I9, 10, that the same shall not contact the fixed rim, it heilig cssential that the rim shall be ermitted to seat itself firmly on the bac flange, 7, However, as indicated in Fig. 7, the pro jections of the demountable rim may bc made to fit the fixed rim simultaneously with the engzagement of the rim with the back flange, This construction necessitates the employment of finer or closer methods of manu acture, and, furthermore, is open to the objection that engagement between thc projections and the Xed rim is likely to cause the distortion of the demountablerim.

In the preferred form of my invention the projections, 10, are made by shearing short circumferential lengths of the rim upon lines, 10", and depressing the portions, 10h.y adjacent the shearing line. In this manner the projections are made integral with the. body of the rim, and I lind this construction desirable Whether the rim is of cold rolled or hot rolled section.

But, as indicated in Figs. 6 and 8, approximately as goed results may be secured when the projection, 9, takes the form of a circumferential rib on the inner periphery lof the rim and parallels the outer flange thereof. For rims of hot rolled section this rib may be deemed the best form.

As shown in Figs. 1 and 2, I prefer that there shall be six of the integral, shouldered projections, 10, for coaction with pressure lugs or washers, 12, on as many bolts 13. The latter are equipped with nuts, 14, which press against respective washers, 12. The bolts are provided with heads, 13, which bear against the inner side of the felly, 6. They need not engage the fixed rim, 7.

As well known, the pneumatic tire, T, has a valve stem, t', and the felly and fixed riml contain a valve stem hole to admit saine. At that point I prefecto rovide a driving connection, 15,' between t e fixed rim and the demountable rim. The office of this con* nection is to lprevent circumferential {novement or creeping of the demountable rim on the wheel.

As a preliminary to placing the demountable rim on the wheel, the nuts, 14, and washers, 11. are removed from the bolts, 13. The valve stem, t', is placed in the wheel and the rim is buttoned on the wheel in the usual manner, e'. e., the demountablerim is swun and seated firmly afgainst or upon the conical back flange, 7*, o the fixedrim. Whether the proections of .the demountable rim be of form or of form 10, they serve to assist the back {iange in initially centering the demountable rim on the wheel. The nuts and washers are then replaced and Screwed home on the bolts, 13. As shown, the wash- Sil Uli.

' ers or lugs, 11, act against respective pro- )'ections, 10, and firmly secure the demountable rim. i

A.wheel constructed in accordance with the foregoing description possesses the advantage of being self-tightening, inasmuch as the bolts constantly draw the tapered Afelly, 6, into the tapered or Vconical fixed Tim. In this manner the folly and spokes are continuously compressed or contracted withinthe fixed rim.

A special advantage of the conical fixed rim and self-tightening arrangement, resides in the fact that it is unnecessary to provide'a metal-to-metal abutment or engagement between the fixed rim and the heads of the clamping bolts.

That form of my invention which is herein shown vand described possesses the advan-v tages of maximum strength, the best possible distribution of material, and minimum cost.

To' those who are skilled in` the art, it will be apparent that by means of the structure herein disclosed, I accomplish the ful-- filment of all the objects and requirements set forth in the opening paragraphs of this specification.

While I have illustrated and described my invention in accordance with the patent statutes, I desire it to be understood that the details of construction may be materially varied and that many changes, modifications and substitutions may be made in the demountable rim construction herein illustrated without departing from thc S irit and scope of my invention as set fort Vplurality of inward projectionsadapted to coact with said tapered fixed rim and with said clamping devices, 'substantially as and for the purpose specified.

In testimony whereof, I have hereunto Set my hand this 9th day of August, 1916.

KING BAKER. 

